Press the down arrow to go down, the up arrow to go up, the left arrow to go left and the right arrow to go right and click the green flag to start. Make sure you get the angry Nano first or the game won't work properly. The aim of the game is to rescue both of the Nanos. Hope you like it!
I used a simple tutorial to code the basics and added my own ideas afterwards. I recommend you to do the same. If there are any glitches or improvements I could make, say so and I'll try and do my best to correct them.